One year into Microsoft’s $26.2 billion acquisition of LinkedIn, the professional social networking site is starting to serve ads targeted at the inboxes of Microsoft Outlook users.

The move is part of LinkedIn’s new native ad network LinkedIn Audience Network that will place advertisers’ sponsored posts into ad inventory found in third-party publishers and apps. LinkedIn is working with a handful of ad-tech companies including Google’s DoubleClick ad exchange, Rubicon Project, MoPub, Sharethrough and Microsoft properties like MSN and Outlook.

Starting today, Outlook.com users may see an ad in their inboxes labeled as sponsored content from LinkedIn. Publishers that run ad inventory through the ad-tech companies like the MyFitnessPal mobile app will also begin displaying advertisers’ LinkedIn posts alongside content.